Fibocom L850gl Change Imei !exclusive! May 2026

Technical Deep Dive: Modifying the IMEI on Fibocom L850-GL Fibocom L850-GL is a high-performance LTE Cat9 module based on the Intel XMM7360

chipset, commonly found in Lenovo ThinkPads and HP laptops. While users often seek to change the International Mobile Equipment Identity (IMEI) to bypass carrier restrictions or "repair" a lost identifier after a firmware update, doing so on this specific hardware is exceptionally difficult and carries significant risks. Manjaro Linux Forum The Core Challenge: SecureLevel and OTP Memory

Unlike older modems (like Huawei or Quectel) that often accept simple AT commands for IMEI modification, the Fibocom L850-GL was designed with higher security standards. One-Time Programmable (OTP) Memory:

Many technical documents indicate that for modern Fibocom modules, the IMEI is written to OTP memory

. Once set at the factory, this hardware-level storage cannot be overwritten through standard software methods. SecureLevel 0 Requirement: Modification is generally only possible on modules with SecureLevel: 0

. Most retail L850-GL units ship with a higher security level, effectively locking the IMEI from further changes. Intel XMM Architecture:

Because it uses an Intel chipset rather than the more common Qualcomm Snapdragon, standard tools like

(which use QCN files to store IMEI) are not compatible with the L850-GL. Known Approaches and Limitations 1. The AT Command Method (Rarely Successful) fibocom l850gl change imei

Some users attempt to use the standard "IMEI Write" AT command, though it is frequently disabled or returns an error on retail L850-GL units: AT+EGMR=1,7,"YOUR_NEW_IMEI" xmm7360/xmm7360-usb-modeswitch: Tools for the ... - GitHub

Changing IMEI on Fibocom L850-GL: A Step-by-Step Guide

The Fibocom L850-GL is a popular cellular module used in various IoT devices, providing wireless connectivity and communication capabilities. However, there may be situations where you need to change the IMEI (International Mobile Equipment Identity) of your Fibocom L850-GL module. This article will guide you through the process of changing the IMEI on your Fibocom L850-GL module.

Why Change IMEI?

There are several reasons why you might want to change the IMEI of your Fibocom L850-GL module:

1. Regulatory compliance: Some countries have regulations requiring unique IMEIs for each device.
2. Network operator requirements: Some network operators may require a specific IMEI range for devices connecting to their network.
3. Device identification: Changing the IMEI can help identify a device on a network or in a fleet of devices.

Precautions

Before attempting to change the IMEI on your Fibocom L850-GL module, please note: Technical Deep Dive: Modifying the IMEI on Fibocom

1. IMEI change may void warranty: Modifying the IMEI may void the warranty of your device or module.
2. IMEI must be unique: Ensure the new IMEI is unique and not already in use by another device on the network.
3. Follow proper procedures: Improperly changing the IMEI can cause issues with device connectivity or even render the device unusable.

Tools and Requirements

To change the IMEI on your Fibocom L850-GL module, you will need:

1. AT command tool: A software tool that allows you to send AT commands to the module (e.g., HyperTerminal, PuTTY, or a dedicated AT command tool).
2. Serial connection: A serial connection to the module (e.g., USB-to-serial adapter or a direct serial connection).
3. New IMEI number: A valid, unique IMEI number to assign to the module.

Step-by-Step Instructions

To change the IMEI on your Fibocom L850-GL module:

1. Connect to the module: Establish a serial connection to the module using your chosen AT command tool.
2. Enter AT command mode: Send the AT command to enter AT command mode. The module should respond with OK.
3. Disable IMEI write protection: Send the AT+EGMR=0,1 command to disable IMEI write protection.
4. Set new IMEI: Send the AT+EGMR=1,1,"<new_imei>" command, replacing <new_imei> with your desired IMEI number (e.g., AT+EGMR=1,1,"353490123456789").
5. Verify IMEI change: Send the AT+CGMI command to verify the new IMEI has been set.
6. Enable IMEI write protection: Send the AT+EGMR=0,0 command to re-enable IMEI write protection.

Conclusion

Changing the IMEI on your Fibocom L850-GL module requires careful attention to detail and adherence to proper procedures. Ensure you have a valid, unique IMEI number and follow the step-by-step instructions outlined in this article. If you are unsure or uncomfortable with the process, consult with a qualified technician or contact Fibocom support for assistance.

Step 3: Verify Current IMEI

Send the following AT command (press Enter after each): Precautions Before attempting to change the IMEI on

AT+CGSN

Expected response: +CGSN: 123456789012345 (your current IMEI).

Save this value somewhere safe.

Troubleshooting

| Issue | Possible Fix | |--------|----------------| | ERROR after AT+EGMR | IMEI change is locked by firmware. Try AT+EGMR=0,7,"NEW_IMEI" instead. | | No COM port in Device Manager | Reinstall Fibocom drivers from Lenovo/Dell support site. | | Modem disappears after command | You may have corrupted NVRAM. Reflash factory firmware. | | IMEI reverts on reboot | Command didn’t write to permanent memory. Try AT+CFUN=1,1 after change. |

Using AT Commands

1. Connect to the Module: Use a terminal or serial console software. Set the baud rate appropriately (typically 115200 for many modules).

2. Enter AT Command Mode: Send AT and press Enter. The module should respond with OK.

3. Enable Editing: Some modules require you to enable the editing of parameters. This might involve using a specific AT command like AT+EGMR=1,1 to enable writing.

4. Change IMEI: Use the AT command AT+EGMR=1,2,"new_imei" where new_imei is the new IMEI you want to set. For example: AT+EGMR=1,2,"490154203237518".

5. Reboot the Module: After changing, reboot the module for the changes to take effect.